Consider 2kg of helium gas, initially at 260 K, in an insulated container. A paddle wheel adds 800 kj of work to the gas. Determine the final temperature of the gas. Assume constant specific heat at 300K

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.